Mexican Stuffed Shells

Ingredients

• 13 ounces lean ground beef, broiled 2 min
• 12 cup chopped onion
• 1 garlic clove, minced
• 1 teaspoon chili powder
• 14 teaspoon ground cumin
• 14 teaspoon dried oregano
• 14 teaspoon salt
• 12 cup spicy salsa or 12 cup mild salsa
• 14 cup light sour cream
• 3 ounces jumbo pasta shells, cooked and drained (about 12)
• 1 12 ounces coarsely shredded reduced-fat sharp cheddar cheese
• 12 cup shredded lettuce
• 2 tablespoons diced seeded tomatoes